Insectifuge.



' 1,029,203. No Drawing.

,UNITED STATES PATENT OFFICE.

OSCAR R. IiOEW-ENTHAL, onvancbvvnn, RIrisircoLuMBm, ciiiwana. H

msncrrrucn Specification of Letters Patent. P t nted June 11, 1912. Application filed March 1,1912. Serial No. 682,280.

I To-all whom it mag concern.- I

Be 'itknown that I, OSCAR R. LonwnN- 'THAL, citizen of the United States of Amera, residlngat'Vancou'ver, in the Province .-of British Columbia, Canada, have invented a-new and useful Insectifuge, of which the following is a specification.

This invention .relates to a composition powder for driving, cockroaches from a locality, which they may infe'st.-

It consists of the composition with an ingredient which possesses characteristics.

which are objectionable to the cockroach;

- with otheringredients designed to preserve 15 unimpaired the peculiarities, whichare distasteful to the cockroachand that will prevent the powder from becoming lumpy.

The composition and the reason for the introduction of the several ingredients are. described in the follovvlng' particularly specification. H I The primary ingredient ,in this composition is powdered borax, which experlence has "proved tobe'particularly objectionable. to the cockroach, whether on account of'the 7 sharp corners of the crystals or otherwise I am 'unableto say definitely. .The-use of the borax alone is not satisfactory asit deteriorates in the purpose for which it is de signed, when exposed to moisture, presumably as the crystals lose their sharp edges. To prevent'the moisture attackinglthe boraxcrystals I; associate with .it dry com'mon salt on the theory. that the salt will appropriate the nioisture which might otherwise attack the; borax. In order to preventthe'borax and salt from becoming lumpy',- I add flour of sulfur and boracic acid in equal propor tions,' which being non-absorbent and non- "adherent prevent the particles of saltand boraxfrom I adhering together and Jen-able .I-the powder to maintain its conditio I as av I dry loose powder inwhich condition i' is de- 'sirable that it should be applied to the haunt s of the cockroach.

The proportions as used are as follows:"

two parts by weight of powdered borax,

one part of dry comnron salt, one part of flour of sulfur and one part of boracic acid.

The salt is first well dried in a heated vessel .50

which heat is 'maintained until after the powdered borax has-been added and is thoroughly mixed, with it and thereafter the. sulfur and boracic acid are added and the.

whole is thoroughly mixed together and 5.5--

packed in" air-tight tins or cartons, The powderthus prepared is dusted over the nestsand runways of the cockroach with the result that they vacate their haunts and 1 leave the premis 3 7 Having now particularly described my invention and the manner of preparing the same, I hereby declare that what I claim as 7 new and desire to be protected in by Letters f Patent, is: H I 1. The insectifuge, comprising powdered borax, dry common salt and flour of sulfur 1 substantially as specified.r

3. The insectifu e, comprising two parts by'weight -of pow ered borax one art oi dry common salt, one part of dour 'o' sulfur and one part of boracic acid. v

In testimony whereof I have signed my name to this specification in the presence oftwo' subscribing witnesses. OSCAR R. LOEWENTHAL.

Witnesses: .RoWLANp' BRA'I'IAIN, WM. S. Sooner. l

2'. The insectifuge, comprisingpowdered" borax, ry mon l flour of sulfur and 'fl oracic acid. 

